Roving-clamp for spinning-machines.



G. F. ROBERTS. ROVING CLAMP FOR SPINNING MACHINES. APPLICATION FILED APR-8. 1913.

03 0 Batentd Feb. 24, 1914 entrain era'rns PA TENT enrich;

. ens rhnoiafn m's, or FRIES? VIRGINIA.

Y Ravine-errata? ron SPINNING-MACHINES.

To all 1072 am it may concern I Be it known that 1, Gus F. Ronnnrs, a

citizen of the United States, residing in Fries, in the county of Graysonand State of purpose of preventing the waste of roving or damage to the rolls when the threads break between the rolls and spindles which normally receive them. In such mechanism the roving usually passes through trumpet guides carried by a reciprocating traversev bar to the drawing rolls and then to guides formed on the ends of wires which are so connected with the devices for breaking the thread at the rear side of the drawing rolls that normally while the machine is in operation said clamps or breaking devices are inoperative, but the arrangement is such that when a thread breaks on the delivery side of the rolls, the guide wire, which is normally held elevated by the thread, will dropj-and cause the clamp or thread-breaking device; to operate to break the roving at the receiv ing side of the drawing rolls and thus stopthe feed of roving through the rolls and; prevent the piling up of threads or the en-. tanglement thereof with the mechanism. According to my invention I have Provided novel devices of this character which are supported entirely by the traverse bar of the machine and which are simple and inexpensive in construction, very sensitive in operation and which, when a thread breaks, causes the roving to be clamped on the receiving side of the rolls and to be broken off in such manner that only a very short length of loose roving'is carried through the rolls. in connection with such clamping devices I employ devices also supported on the traverse bar by means of which the clamps on the spinning frame'may all be held up or out of engagement with the roving when the machine is being dofi'ed. The constructionof the mechanism and the manner in which it operates will be hereinafter more fully deseribed.

In the accompanying drawings, Figure 1 shows a vertical section of a portion of a spinning frame with my improvements applied. the parts being in the positionwhich they occupy when the roving is being fed through the drawing rolls and thethread is being properly passed to the spindles. Fig.

2 is a similar view showing the position of i Specification of Letters Patent. t t 24 1914, I Application filed April 8, 1913. Serial No. 759E533.

plied to drawing rolls of usual construction, These rolls A. are supported on a roll beamB by standards C ofusual form. The traverse bar D which is operated inthe usual way, is arranged in rear of the drawing rolls and to this bar in rear of each set of rolls is secured a frame E provided at its upper end with a guide a, while its lower end is bent or doubled at e and carried upwardly and then rearwardly to form a supporting arm for the frame F which carries the trumpet guide G and the clamp H. This trumpet guide'is of usual construction, but I locate it in rear of the clamping device instead of between the clamping device and the rolls as in some other machines. 9 also support hangers or brackets I in which is mounted a horizontally arranged shaft J carrying lifting devices K hereinhfter referred to. This shaft J extends from one end of the frame to the other and lifting devices K are employed in connection with each set of rolls and clamping devices. i

v The clamping device H is. pivoted at E to the upper end of the frame F which, as will be noted, extends forwardly from its rear portion above the frame bar 0 and then upwardly at f, the pivot It being located at the upper end. of part f. Theforwardly extending part f of the frame F ooiiperates with the clamp H to clamp the roving. This clamping device H is preferably of the t how being su t n ia y sh p d. cross-section, having a part is within Ledge k wh ieh is adapted same chase tie the Some of the arms.

part f of the frame F and it has a part h provided with an inclined edge h, the di-' rectionof said incline being from its upper front portion downwardly and rearwardly.. As indicated in Fig. 5, the frame 'F is adjustably secured to the arm e of the frame E by a bolt E which engages the arm e the frame F disposed belowthe arm e By such 'devices the clamping device H may be adjusted forwardly and rearward'ly to a limited extent.

M indicates a device similar to. what is ordinarily called in this art a drop wire. feeler or clamp-operating device. v This drop wire or device is preferably made of wire and is adapted at its front end to engage the thread as it comes from the drawthread passes. The wire, it will be ob-- served,'is bent at m to form the front portion m of the dev ce on the upper end of which the eye m is located. The device also has a rearwardly extending portion m which extends through supports or bearings, one of which is provided by the down-' wardly extending arm n of a rod X secured tothe frame E and the other support 0 5 for the device M is formed by a hanger O attached to the frame E. The rear end of ed to e'ngage the inclined edge 71* of the clamp H. The clamp-lifting rod is guided near its upper end by a rod R attached to the frame E and extending through a perforation in the laterally extending arm 1' of the rod Q. The bearings n and 0 sustain -the entire weight of the drop wire which latter merely touches or makes contact with the thread without exerting any strain or placing any weight'thereon, the device being nicely balanced for this purpose and is prevented from moving to the right or to the'left by the thread in the normal operation of the machine, but should the thread break the drop Wire can move sidewise and thus turn the crank P and operate the clamp.

In Fig. 1 the mechanism is shown in its normal position where the roving passes freely through the trumpet guide and beneath the clamp to the drawing rolls and thence to the spindle. As long as the drop wire M is held by the thread in the position shown in Fi 1, the clamp H is inoperative but if the thread breaks between the drawing rolls and the spindle, the drop wire M will drop to the right or to the left to the position shown in Fig. 2, said wire turning in its bearings and thus turning the crank P and causing the lifting device Q to move out of engagement with the clamp H which latter then, by its own gravity, drops and. clamps the roving between its edge h and the part f of the frame F.- The clamp H is so hung that when its edge 72. reaches the part f of the frame it can swing no farther or can- 5 not assume a vertical position so that the drawing rolls acting upon the rovin and extends through a slotted portion f of i will cause the latter to be broken at or in advance of the clamp. It will thus be seen that the clamping device may be made comparatively light, no weight being required in order to make it efficient because the forward movement of the roving beneath the clamp tends to draw the clamp tightly against the frame at 1. By merely turning the drop wire M from the position shown in Fig. 2 to that shown in Fig. 1 the clamp may be lifted. in-g rolls. For this purpose it may be provided with an eye m through which the- To piece or splice the broken thread after the roving is' released the end thereof is passed through the guide 6 and into the bite of the drawing rolls which move it forward.

At this time the drop wire M and the clamp H are in the position shown in Fig. Q'and remain in this position until the piecing or splicing is completed. After this the attendant picks up the drop wire and puts the pieced thread through the eye m and in so doing the drop wire is turned about its axis and the crank P is raised, causing the 1 clamp lifted Q to rise and engage the inthe wire is formed with a crank-arm "P which carries a clamp-lifting rod Q pro- 1 vided at its upper end with an arm '1' adapt clined edge 71* of the clamp, thus lifting said clamp out of contact with the frame f or.

the roving thereon. Vhen this is done, the roving assumes its position on the top of the rame and under the edge 71. of the clamp. \Vhen the machine is to be doffed, or when it is desired to hold all the clamps out of action, it may be done by means of clampholding devices K carried by the rod J. This rod is operated by an arm S attached to the rod J and provided with an operating lever T. Figs. 1 and 2 show the normal position of the holding devices, the operating lever T being held-by a catch It. By lifting the lever out of engagement with the catch 2? and moving it forward and causing the notch t to engage the catch t the clamps H may all be held in an elevated position or lifted throughout the series and may be held in such position until the machine is again started, when the lever T may be moved rearwardly and engaged at t as shown in Figs. 1 and 2. It will be observed that the holding devices are provided with notches 7a having'inclined walls which facilitate in engaging the crank arms.

By means of the devices shown in Fig. 5, the relative position of the clamping device H and the clamp lifting device Q, may be varied so as to cause said lifting device .to engage the inclined edgeh sooner or later, as may be required.

One of the important features of myinvention is the arrangement of the drop" wire .ings.

in such manner that it does not exert any strain on the thread but is, merely held in an upright position by the thread until the lat ter breaks when the device will fall. in the manner before described. This is accomplishedby so supporting the drop wire that it turns about an axis transverse to the axes of the drawing rolls, the entire weight of the drop wire being sustained in its bear- In this way no weight or, strain is placed on the thread and when the thread breaks or becomes abnormally loose the eye m of the drop wire moves to the right or to theleft of the plane of the thread in a plane parallel with the axes of the drawing rolls and the wire so turns in its bearings as to lower the crank P and thu; permit the clamp H to drop and engage the roving.

I claim as my invention:

1. The combination. with the drawing rolls of a spinning machine, of a clamp for the roving in rear of the rolls, a drop wire having a thread engaging end in front of the rolls which is so balanced as to merely mak at ral contact with the thread with out exerting a. vertical strain thereon, bearings in which the drop wire is mounted to move about an axis transverse to the axes of the drawing rolls. and connection between the drop wire and the clamp whereby th tte s rmally held out of enga ing position with the roving but which al ows the clamp to engage the roving when the. thread issuing from the rolls breaks.

2. The combination with the drawing rolls of a spinning maohine. of a clamp for the roving in rear of the rolls, a drop wire having a thread-engaging end in front of the rolls'which is so balanced as to merely make lateral contact with the thread withoutexerting a. vertical strain thereon, bearings in which the drop wire is mounted to automatically move when the thread breaks either to the right or to the left of the plane of the thread about an axis transverse to the axes of the drawing rolls, and connections between the drop wire and the clamp whereby the latter is normally held out of engagement with the roving but which allows the clamp to engage the roving when the thread issuing from the rolls breaks.

3. The combination with the drawing rolls of aspinning machine, of a freely pivoted clamp for the roving in rear of the rolls, a drop wire having a crank arm at its rear end and a thread-engaging end in front of the rolls which is so balanced'as to merely ma'ke lateral contact with the thread without exerting a vertical strain thereon, bearings in which the drop wire is mounted to move either to the right or to the left of the plane of the thread about an axis transverse to the axes of the rolls, and a vertically moving rod pivotally connected at its lower end with the crank arm and having an upper portion on which the clamp normally rests but which separates from the clamp when the thread breaks and allows the clamp to drop.

4. A roving clamp. comprising a clampsupporting frame, a clamp mounted thereon, a drop wire having a thread-engaging portion in front-of the drawing rolls and provided at its rear end with a crank arm, a clamp-lifting rod normally engaging the clamp and pivotally connected with the crank arm, and a clamp-holder comprising a shaft. means for turning it and an arm projecting from the shaft having a notch with beveled edges adapted to engage the crank arm of the drop wire,-fo1' the purposes specified.

In testimony whereof, I have hereunto subscribed my name.

GUS F. ROBERTS. \Vitnesses:

LLoYo B. WIGHT, M. E- BURRELL. 

